Author Topic: What is the advantage of using OpenEXR for Passes  (Read 1013 times)

2022-01-02, 06:44:42

ShynnSup

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I thought the advantage of using OpenEXR was to save all my passes in one single file and be able to use that in PS or other image editing software, but when I click 'save All', an OpenEXR file is created for each pass (z depth, reflec, refra, id, etc.) So... what is so special about OpenEXR besides being 32 bit?

Also, can someone clarify for me which passes do I need to re create the beauty pass? Thanks!

« Last Edit: 2022-01-02, 06:48:07 by ShynnSup »

2022-01-02, 23:00:44
Reply #1

burnin

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Corona saves all layers in a single file.
Here's how to: TUTORIAL: CESSENTIAL Render Elements (playlist)


Note C4D Render settings:
- Save Regular Image is saved flat / single layer

but other options work fine
+ Save Multipass Image as... EXR /
Multilayer (checked)
+ Picture Viewer w/ Layers (checked)
+ Corona VFB

2022-01-03, 14:19:22
Reply #2

ShynnSup

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Thanks for the reply.

I am afraid I still was no able to get all my passes in a single EXR file... even with Multi-Layer File checked in Save options... Tried saving from VFB, both as Save and Save All, and also tried setting a max pass count and defining a location to save before rendering.

I am opening the EXR file in Photoshop, and all channels I see are RGB, Red, Green and Blue.


The linked tutorial saves each EXR file separately...
It was useful to realize that all passes under 'Basic' category are the needed ones to replicate the Beauty Pass.

But I have one more doubt, at one point in the tutorial (min 4:12) he says: "to properly compose the images in post you will always need to save them as full float 32 bits per channel".
But yet Corona leaves 16 bit as default value... will it still work fine?


2022-01-03, 15:00:35
Reply #3

davetwo

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Photoshop is pretty old fasioned TBH and doesn't read EXR layered data properly. (Ridiculous really, as Affinity does, and that is mega cheap.)
People often use EXR for more more motion based compositing softwares such as Nuke.
There may be no advantage if your workflow is stills in PS

2022-01-03, 15:27:13
Reply #4

TomG

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If you are going to do anything with EXRs in Photoshop, always have https://www.exr-io.com/ installed (it's free), otherwise PS is no good with EXRs. May not resolve this issue, but is a must-do anyway.
Tom Grimes | chaos-corona.com
Product Marketing Manager | contact us

2022-01-04, 14:01:00
Reply #5

ingemar

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Darn, no Mac version… Any good alternatives available for MacOS?

2022-01-04, 14:05:05
Reply #6

Beanzvision

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Darn, no Mac version… Any good alternatives available for MacOS?
Sorry, I'm not sure about that. Maybe write to the creator and request a Mac version?
Bengamin Jerrems l chaos-corona.com
Chaos Corona Support Representative l contact us

2022-01-05, 22:00:53
Reply #7

Philw

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2022-01-06, 13:57:25
Reply #8

ingemar

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Thanks! I’ll give it a try.

2022-01-09, 00:06:51
Reply #9

ShynnSup

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Regardless of the image editing software, Corona still saves one EXR file for each pass. I am saving from the VFB.